From gameto- + -phobia.
gametophobia (uncountable)
- The fear of marriage.
1998, Rose Dorrance Beser, Why Some People Act So Stupid and What You Can Do About It, Dewey Publishing, →ISBN, page 69:One phobia they don't have is gametophobia (marriage). No living-in-sin for them, only licit thrills.
2005 May 14, ChicKita [username], “Re: Are you paraskevidekatriaphobic?”, in alt.support.stop-smoking[1] (Usenet):No, but supposedly i have gametophobia
2008 February, Spin, page 30:The Houston vet returns to the game to confess that he suffers from gametophobia, the fear of marriage.